CN102932710B - Method and device for bass compensation - Google Patents
Method and device for bass compensation Download PDFInfo
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- CN102932710B CN102932710B CN201210382158.0A CN201210382158A CN102932710B CN 102932710 B CN102932710 B CN 102932710B CN 201210382158 A CN201210382158 A CN 201210382158A CN 102932710 B CN102932710 B CN 102932710B
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Abstract
The invention is suitable for the technical field of audio processing and provides a method and a device for bass compensation. The method comprises the steps of: separating low-frequency signals and high-frequency signals from received sound signals according to a preset loudspeaker cut-off frequency; sampling the low-frequency signals subjected to amplification treatment according to preset sampling quantity and sampling stepping quantity to generate multi-order harmonic signals; carrying out harmonic treatment on the multi-order harmonic signals and preserving the first N frequency-doubling harmonic signals in the low-frequency signals; carrying out delay treatment on the high-frequency signals; superposing the high-frequency signals subjected to delay treatment and the first N frequency-doubling harmonic signals and outputting digital audio signals; and converting the digital audio signals into analog audio signals to be sent to a loudspeaker so as to make the loudspeaker capable of producing sound. According to the invention, the high-frequency signals and the low-frequency signals are separated from the sound signals according to the loudspeaker cut-off frequency and are respectively treated and superposed, so that bass compensation is realized.
Description
Technical field
The invention belongs to audio signal processing technique field, particularly relate to a kind of method and device of bass compensation.
Background technology
Along with the trend of electrical equipment development is more and more miniaturized, thus cause the volume of electrical equipment loud speaker more and more less.The sound expression effect of size to loud speaker of loud speaker has considerable influence, when loud speaker volume reduces, the vibrating diaphragm area of loud speaker and magnet all can diminish, pressure when promoting sound vibrations reduces, cause the wave volume amplification effect of loud speaker to weaken thus, acoustic low-pass part cannot be given expression to fully.
Summary of the invention
The object of the embodiment of the present invention is the method and the device that provide a kind of bass compensation, is intended to solve the problem that loud speaker cannot give full expression to out sound low frequency part.
Embodiments of the invention are achieved in that a kind of method of bass compensation, said method comprising the steps of:
According to the loud speaker cut-off frequency preset, the voice signal of reception is isolated low frequency signal and high-frequency signal, and described cut-off frequency is preset in bass compensation device;
Amplification process is carried out to described low frequency signal;
According to the number of samples preset and sampling stepping-in amount, generate multistage harmonic signal to the low frequency signal sampling of amplifying after process, the frequency of described multistage harmonic signal is
wherein number of samples is 2
n, sampling stepping-in amount is M, and the frequency of low frequency signal is f;
Filtering process is carried out to described multistage harmonic wave, retains the top n multiplied frequency harmonic signal in described low frequency signal, described N be greater than 1 integer;
Delay process is carried out to described high-frequency signal;
By through the high-frequency signal of delay process and described top n multiplied frequency harmonic Signal averaging, outputting digital audio signal;
Convert described digital audio and video signals to simulated audio signal and be sent to loud speaker, can sound to make loud speaker.
Another object of embodiments of the invention is the device providing a kind of bass compensation, and described device comprises:
Separative element, for according to the loud speaker cut-off frequency preset, the voice signal of reception is isolated low frequency signal and high-frequency signal, and described low frequency signal is sent to amplifying unit, described high-frequency signal is sent to delay process unit, and described cut-off frequency is preset in bass compensation device;
Amplifying unit, for carrying out amplification process to described low frequency signal, and sends to sampling unit by the low frequency signal after amplifying process;
Sampling unit, according to the number of samples preset and sampling stepping-in amount, generate multistage harmonic signal to the low frequency signal sampling of amplifying after process, and described multistage harmonic signal is sent to filter unit, the frequency of described multistage harmonic signal is
wherein number of samples is 2
n, sampling stepping-in amount is M, and the frequency of low frequency signal is f;
Filter unit, for carrying out filtering process to described multistage harmonic wave, retains the top n multiplied frequency harmonic signal in described low frequency signal, described N be greater than 1 integer, and described top n multiplied frequency harmonic signal is sent to superpositing unit;
Delay process unit, for carrying out delay process to described high-frequency signal, and sends to superpositing unit by the high-frequency signal through delay process;
Superpositing unit, for by through the high-frequency signal of delay process and described top n multiplied frequency harmonic Signal averaging outputting digital audio signal, and sends to D/A conversion unit by described digital audio and video signals;
D/A conversion unit, is sent to loud speaker for converting described digital audio and video signals to simulated audio signal, can sound to make loud speaker.
The embodiment of the present invention is according to the cut-off frequency of loud speaker, isolate low frequency signal and high-frequency signal, low frequency signal is passed through the mode process such as amplification, sampling, superposition low frequency signal, by the low frequency signal after process and high-frequency signal superposition, add low frequency signal ratio in whole signal, signal after whole process is sent to loud speaker, makes loud speaker more give full expression to out the low frequency part of sound.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the realization flow figure of bass compensation method provided by the invention;
Fig. 3 is the multistage harmonic frequency signal performance plot generated in flow process of the present invention.
Fig. 4 is the function structure chart of bass compensation device provided by the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Figure 1 shows that theory diagram of the present invention.
In practice, the loud speaker of TV and some electrical equipment is because spatial limitation, cut-off frequency is about 150HZ to 200HZ, loud speaker cannot well reappear lower frequency, go to drive loud speaker there is no practical significance with these low-frequency sounds, force loud speaker to make the scope exceeding its ability on the contrary to move, even make HFS distortion.Such as 150HZ is loud speaker cut-off frequency, and needs audio plays to be 100HZ, and the low-frequency sound content that loud speaker cannot reappear by the present invention, by improving frequency multiplication to 200HZ, 300HZ or higher, makes it to be play.Because audio content is 8 degree of sounds, according to psychoacoustic principle, the ear of people and brain can be induced to think the content having heard low-frequency sound.
The invention provides a kind of bass compensation method, described method is performed by bass compensation device, and as shown in Figure 2, concrete steps comprise the method:
The loud speaker cut-off frequency that S101, basis are preset, isolates low frequency signal and high-frequency signal by the voice signal of reception;
It should be noted that, for television set, the low-frequency cut-off frequency of loud speaker, 150HZ to 200HZ (different TV loudspeaker cut-off frequencies is different), cannot drives loud speaker for the low frequency part lower than cut-off frequency, even cause HFS distortion.
It should be noted that, first need the cut-off frequency knowing loud speaker, the cut-off frequency of loud speaker is preset in bass compensation device.
S102, described low frequency signal carried out to amplification process;
The number of samples that S103, basis are preset and sampling stepping-in amount, sample to the low frequency signal amplified after process and generate multistage harmonic signal;
It should be noted that, suppose that number of samples is 2
nindividual, sampling stepping-in amount is M, and the frequency of low frequency signal is f, and the frequency representation of the first harmonic that sampling generates is
by controlling the number of samples preset and stepping-in amount of sampling, the frequency of multistage harmonic signal just can be controlled.
It should be noted that, the multistage harmonic frequency signal characteristic that sampling generates as shown in Figure 3.
S104, filter the high fdrequency component of described multistage harmonic signal, retain the top n multiplied frequency harmonic signal in described low frequency signal;
It should be noted that, here N be greater than 1 positive integer.
S105, delay process is carried out to described high-frequency signal;
S106, the high-frequency signal through delay process to be superposed with described front N order harmonic signal, outputting digital audio signal;
S107, convert described digital audio and video signals to simulated audio signal and be sent to loud speaker, can sound to make loud speaker.
Optionally, the method realizing S101 specifically can comprise:
The voice signal of reception is filtered out frequency higher than described default loud speaker cut-off frequency part, isolate low frequency signal, the voice signal of reception is filtered out frequency lower than described default loud speaker cut-off frequency part, isolate high-frequency signal.
The invention provides a kind of bass compensation device, described bass compensation device as shown in Figure 4, specifically comprises:
Separative element 21, for according to the loud speaker cut-off frequency preset, isolates low frequency signal and high-frequency signal by the voice signal of reception, and described low frequency signal is sent to amplifying unit 22, described high-frequency signal is sent to delay process unit 25;
Amplifying unit 22, for carrying out amplification process to described low frequency signal, and sends to sampling unit 23 by the low frequency signal after amplifying process;
Sampling unit 23, for according to the number of samples preset and sampling stepping-in amount, generates multistage harmonic signal to the low frequency signal sampling of amplifying after process, and described multistage harmonic signal is sent to filter unit 24;
Filter unit 24, for filtering the high fdrequency component of described multistage harmonic signal, retains the top n multiplied frequency harmonic signal in described low frequency signal;
Delay process unit 25, for carrying out delay process to described high-frequency signal and the high-frequency signal through delay process being sent to superpositing unit 26;
Superpositing unit 26, for by through the high-frequency signal of delay process and described top n multiplied frequency harmonic Signal averaging outputting digital audio signal, and sends to D/A conversion unit 27 by described digital audio and video signals;
D/A conversion unit 27, is sent to loud speaker for converting described digital audio and video signals to simulated audio signal, can sound to make loud speaker.
Optionally, above-mentioned separative element 21 specifically for:
The voice signal of reception is filtered out frequency higher than described default loud speaker cut-off frequency part, isolate low frequency signal and send to amplifying unit, the voice signal of reception is filtered out frequency lower than described default loud speaker cut-off frequency part, isolate high-frequency signal and send to delay process unit.
One of ordinary skill in the art will appreciate that the modules included by above-described embodiment is carry out dividing according to function logic, but be not limited to above-mentioned division, as long as corresponding function can be realized; In addition, the concrete title of each functional module, also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
Those of ordinary skill in the art it is also understood that, the all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in bass compensation device read/write memory medium, described storage medium, comprises ROM/RAM etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a method for bass compensation, is characterized in that, described method comprises:
According to the loud speaker cut-off frequency preset, the voice signal of reception is isolated low frequency signal and high-frequency signal, and described cut-off frequency is preset in bass compensation device;
Amplification process is carried out to described low frequency signal;
According to the number of samples preset and sampling stepping-in amount, generate multistage harmonic signal to the low frequency signal sampling of amplifying after process, the frequency of described multistage harmonic signal is
wherein number of samples is 2
n, sampling stepping-in amount is M, and the frequency of low frequency signal is f;
Filtering process is carried out to described multistage harmonic wave, retains the top n multiplied frequency harmonic signal in described low frequency signal, described N be greater than 1 integer;
Delay process is carried out to described high-frequency signal;
By through the high-frequency signal of delay process and described top n multiplied frequency harmonic Signal averaging, outputting digital audio signal;
Convert described digital audio and video signals to simulated audio signal and be sent to loud speaker, can sound to make loud speaker.
2. the method for claim 1, is characterized in that, the loud speaker cut-off frequency that described basis is preset, and the voice signal of reception is isolated low frequency signal and high-frequency signal is specially:
The voice signal of reception is filtered out frequency higher than described default loud speaker cut-off frequency part, isolate low frequency signal, the voice signal of reception is filtered out frequency lower than described default loud speaker cut-off frequency part, isolate high-frequency signal.
3. a device for bass compensation, is characterized in that, described device comprises:
Separative element, for according to the loud speaker cut-off frequency preset, the voice signal of reception is isolated low frequency signal and high-frequency signal, and described low frequency signal is sent to amplifying unit, described high-frequency signal is sent to delay process unit, and described cut-off frequency is preset in bass compensation device;
Amplifying unit, for carrying out amplification process to described low frequency signal, and sends to sampling unit by the low frequency signal after amplifying process;
Sampling unit, according to the number of samples preset and sampling stepping-in amount, generate multistage harmonic signal to the low frequency signal sampling of amplifying after process, and described multistage harmonic signal is sent to filter unit, the frequency of described multistage harmonic signal is
wherein number of samples is 2
n, sampling stepping-in amount is M, and the frequency of low frequency signal is f;
Filter unit, for carrying out filtering process to described multistage harmonic wave, retains the top n multiplied frequency harmonic signal in described low frequency signal, described N be greater than 1 integer, and described top n multiplied frequency harmonic signal is sent to superpositing unit;
Delay process unit, for carrying out delay process to described high-frequency signal, and sends to superpositing unit by the high-frequency signal through delay process;
Superpositing unit, for by through the high-frequency signal of delay process and described top n multiplied frequency harmonic Signal averaging outputting digital audio signal, and sends to D/A conversion unit by described digital audio and video signals;
D/A conversion unit, is sent to loud speaker for converting described digital audio and video signals to simulated audio signal, can sound to make loud speaker.
4. bass compensation device as claimed in claim 3, is characterized in that, described separative element specifically for:
The voice signal of reception is filtered out frequency higher than described default loud speaker cut-off frequency part, isolate low frequency signal and send to amplifying unit; The voice signal of described reception is filtered out frequency lower than described default loud speaker cut-off frequency part, isolate high-frequency signal and send to delay process unit.
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| CN201210382158.0A CN102932710B (en) | 2012-10-10 | 2012-10-10 | Method and device for bass compensation |
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| CN103838970B (en) * | 2014-03-07 | 2016-09-14 | 武汉理工大学 | Towards method for estimating state during the high-precision real of deep-sea dynamic positioning of vessels and system |
| CN106328153B (en) * | 2016-08-24 | 2020-05-08 | 青岛歌尔声学科技有限公司 | Electronic communication equipment voice signal processing system and method and electronic communication equipment |
| CN110720121B (en) * | 2017-03-30 | 2024-04-30 | 伯斯有限公司 | Compensation and automatic gain control in active noise reduction devices |
| CN112511941B (en) * | 2020-12-01 | 2023-06-13 | 恒玄科技(上海)股份有限公司 | Audio output method and system and earphone |
| CN112637741B (en) * | 2020-12-30 | 2023-03-10 | 广州酷狗计算机科技有限公司 | Audio signal processing method, device, chip, electronic equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5930373A (en) * | 1997-04-04 | 1999-07-27 | K.S. Waves Ltd. | Method and system for enhancing quality of sound signal |
| CN1805612A (en) * | 2005-01-14 | 2006-07-19 | 三星电子株式会社 | Method and apparatus for audio bass enhancement |
| CN101715158A (en) * | 2008-10-03 | 2010-05-26 | 瑞昱半导体股份有限公司 | Apparatus and method for processing audio signal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5930373A (en) * | 1997-04-04 | 1999-07-27 | K.S. Waves Ltd. | Method and system for enhancing quality of sound signal |
| CN1805612A (en) * | 2005-01-14 | 2006-07-19 | 三星电子株式会社 | Method and apparatus for audio bass enhancement |
| CN101715158A (en) * | 2008-10-03 | 2010-05-26 | 瑞昱半导体股份有限公司 | Apparatus and method for processing audio signal |
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Effective date of registration: 20210713 Address after: Room 821, No. 333, jiufo Jianshe Road, Zhongxin Guangzhou Knowledge City, Huangpu District, Guangzhou, Guangdong 510000 Patentee after: Skyworth Group Intelligent Technology Co., Ltd Address before: 510530 No.99, Kaida Road, Science City, Guangzhou Development Zone, Guangdong Province Patentee before: GUANGZHOU SKYWORTH FLAT DISPLAY TECHNOLOGY Co.,Ltd. |
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